Kenwood KRC-578R Service Manual page 9

A B
MAIN UNIT
CN400
1 5 9
13P DIN CONNECTOR
2 3
2 6 10
13
1
1
3 7 11
1 REQ H
4 8 12
2 D GND
3 B.U
4 CHCON
5 MUTE
6 A GND
7 RESET
C400 0.1
R409
100K
RN400 100K
2
D401
D400B
D400A
D405
3
D404
D403
D402
C404B C404A C402A 0.47u50
1
+
1000P 1000P
C403 47u16
4
3
+
C402B 0.47u50
2
+
CN200
Rch 3
DOLBY TP
GND 2
C-MECHA
Lch 1
CN201
Lch REV
VREF
5 5 5
Rch REV
Lch REV
4 4 4
Rch REV
Rch FWD
3 3 1
Rch FWD
2 2 2
Lch FWD Lch FWD
1 1 3
R REEL
5
1 11 59
ANODE R253
2 10
120
F REEL
3 9 60
SW5V
4 8
MODE2
5 7 49
MODE1
6 6 48
MODE3
7 5 50
GND
8 4
MAIN MOTOR
M MOTOR+
M
9 3
S MOTOR-
10 2
SUB MOTOR
S MOTOR+
M
11 1
6
CN250
7
C D
CN100
2 1
TU100
4 8 12 11 13
5 7 6 10 9
8 Rch
9 REQ C
10 DATA C
11 DATA H
12 Lch
13 CLK
L101 52mH
L100
4.7uH
Q100 Q102
AM+B Q104
FM+B
FM+B
SW
R102 R104 R106
Q101 Q103
2.2K 2.2K 4.7K
AM+B
SW
L150 4.7uH
RDS
DECODER
IC150
X150
4.332MHz
R202B
180
4.0V
4.0V
1
4.0V
2
IC250
C204
26 1
22u16
C250 0.1
25 2 0.1V
CD1
0V 24 3
OUT1 4.0V
D251
23 4 0V
VR 4.0V
3
22 5
34
21 6 C251 0.047
4.6V 4.0V
IN1
4
20 7 0V 4.0V
GND GND
0V 19 8 4.6V C252 0.047
GND IN2
18 9
35
17 10
R202A
VCC1
180
13.9V
5
C253
0.047
16 11
VCC2
15 12
OUT2
C254 0.1
14 13 0V
0V
CD2
MOTOR DRIVER
C255
10u16
+
11
E F
IC300
R300
D300
1K 4.0V 1
C300 2.2 4.2V 2
C301A 2.2
4.1V 3
1
C301B 2.2
4.1V 4
2
1.0V 5
2
0V 6
3
1.0V 7
1
8
C302 0.033
9
C303
R301 2.7K 0.015 4.1V 10
C304
R302 4.7K 0.47 4.1V 11
R303 4.7K 0.1V 12
0.1V 13
4.6V 14
C305 150P
R105 C306 0.1
1K
C307 120P
RDS
BUFFER
Q301
Q300
NOIS
22K DETECTION
CONSTANT
SELECTION
22K
B
RN150
2.2K
A
1
2
R211B C214B
3.3K 1000P
C205B 1.7V 0V
0.01
20 5.0V
MS MODE 83
19 5.0V
31
DR SW 84
PB FB2
18 5.0V
32 TAPE SW 87
PBR IN2
17 0V
0V 33
MUTE SW 85
1.2V
PB GND
R205 10K
34
88
PBF IN2 4.0V
16 0V C212 10
4.0V
0.8V NR SW
15
35 R209 47K
IC200
VCT
+
C213 0.47
NC
36 EQ-AMP,MS.DOLBY
14 5.0V
PB REF 1.7V
MS OUT 86
37
13 0V R208 100K
PBF IN1
0.8V
MSTC
0V 38
PB GND 4.0V C211 0.022
4.0V
39
PBR IN1
R207 68K C210 4700P
40 12
PBF B1 G1FB
11 R206 5.6K C209 0.47
G2FB
4.0V
C205A
0.01
0V
G H
28
VREF AC OUT L
27
AC OUT R
CREF
26 4.1V
OUT LF 4
CASSL
25 4.1V
OUT RF 5
CASSR
24 4.1V
CDR OUT LR 6
CD GND 23 4.1V
OUT RR 7
CDL
22 8.2V
VS
21 0V
PHGND
GND
4.9V
20
PHONE
SDA
19 5.0V
AM
SCL
18 3.5V
MPX S MUTE
17
LEVEL QUAL
16
MP IN MUXR
15
MP OUT MUXL
E-VOL.NC.
0.6V
MPX
C
NOISE
BUFFER
R307
4.7K MUTE
SW
Q302
Q303
47K
47K
C21
0.01
45
C19
0.01
Q350A,B,
351A,B
MUTE
DRIVER
0V 0V
0V 0V
D350A D352B
0V
Q350A Q350B Q351A Q351B
R354A R354B R355A R355B
22K 22K 22K 22K
D350B D352A
C352A C352B C353A C353B
2200P 2200P 2200P 2200P
0V
1 2 3 4 5 6
CN350
I J
0V
IC3 MUTE SW
5.1V
0V
Q2
14
1
9 CH-MUTE
2
BU DET
3 5.1V
0V uCOM 13 5.1V
MUTE
4
4 CH-RST
12 5.1V
11
PRE
OUT
10 0V
5 9
0V
6 8
P-IC E VOL
7
5.1V
0V
MUTE
5.1V
GATE IC
RN5 1K
34
35
X1
12MHz
C3 R64 680K
22P X2
32.768KHz
C4
22P
48
49
50
RN4
1K
R23 RESET IC
47K
5.1V
IC2
C13
0.01
0V
5V SW
5.0V
5.1V
Q5
R60
27K
4.4V
R58
100K
1 2 3 4 5 6 7 8 9 10 11 12 13
CN3